Geometry
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Geometry is the study of points, lines, planes, circles, polygons, congruency, and similarity. A point has no size, only a location. A line continues indefinitely in opposite directions. A plane is a flat surface that extends in all directions. A segment is part of a line between two points. A ray has one endpoint and extends in one direction. A solar eclipse occurs when the moon, earth, and sun are aligned so that the moon is between the earth and sun.
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